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Polytetrafluoroethylene film

A technology of polytetrafluoroethylene and polytetrafluoroethylene powder, which is applied in the field of polytetrafluoroethylene film, can solve the problems of easy charging, easy pollution, and no wear resistance, and achieves improved electrical conductivity, good antistatic effect, and mechanical properties. improved effect

Inactive Publication Date: 2019-04-26
镇江市宜扬密封制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] PTFE has good insulation, weather resistance and flame retardancy, and is known as the "King of Plastics". However, compared with plastics, it has poor mechanical properties and is not wear-resistant. Electrical insulation, non-conductive, so when the outside is rubbed, it is easy to be charged and generate static electricity. Due to the adsorption of static electricity, when the plastic film is processed, the surface of the film is easy to absorb dust and is extremely easy to pollute.

Method used

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  • Polytetrafluoroethylene film

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1 is loaded with the preparation of the mica sheet of tin dioxide

[0022] 1) calcining mica powder at 600°C for 4 hours to obtain calcined mica powder;

[0023] 2) Disperse 20g of calcined mica powder in 1L of ethanol, then use an ultrasonic crusher (250W) for ultrasonic exfoliation, collect the upper suspension, and then redisperse the remaining samples in an equal volume of ethanol to continue ultrasonic exfoliation. The upper layer is transparent, the collected upper layer suspensions are combined, centrifuged at 3000r / min, and dried to obtain nano-mica sheets;

[0024] 3) Disperse 1 g of nano-mica sheets obtained in step 2) in 100 mL of water to form a mica sheet suspension, adjust the pH to 1-2 with hydrochloric acid, add 0.4 g of SnCl 4 ·5H 2 O, stir at 80-100°C for 2-4h to form a light yellow powder, wash and dry, and calcinate at 600-800°C for 2-4h to obtain mica flakes loaded with tin dioxide;

Embodiment 2

[0026] The polytetrafluoroethylene film described in the present embodiment, by weight, is made up of following components:

[0027] 100 parts of polytetrafluoroethylene powder;

[0028] The prepared load of embodiment 1 has 2 parts of mica flakes of tin dioxide;

[0029] The preparation method of the polytetrafluoroethylene film described in this example is to mix the polytetrafluoroethylene powder in the above ratio and the mica sheet loaded with tin dioxide in a high-speed mixer, and then mold and sinter it to form a certain shape. After blanking, the oriented film is made by turning and rolling process, which is PTFE film 1#.

[0030] Example 2

[0031] The polytetrafluoroethylene film described in this embodiment consists of the following components in parts by weight:

[0032] 100 parts of polytetrafluoroethylene powder;

[0033] The prepared load of embodiment 1 has 3 parts of mica flakes of tin dioxide;

[0034] By the same preparation method as in Example 2, PTFE...

Embodiment 3

[0036] The polytetrafluoroethylene film described in this embodiment consists of the following components in parts by weight:

[0037] 100 parts of polytetrafluoroethylene powder;

[0038] The prepared load of embodiment 1 has 4 parts of mica flakes of tin dioxide;

[0039] By the same preparation method as in Example 2, PTFE film 3# was prepared.

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Abstract

The invention discloses a polytetrafluoroethylene film. The polytetrafluoroethylene film comprises the following components in parts by weight: 100 parts of polytetrafluoroethylene powder and 2-5 parts of stannic oxide loaded sheet mica, wherein the stannic oxide loaded sheet mica is prepared through the following steps: dispersing nanometer sheet mica into water to obtain a sheet mica suspension;regulating the pH value to be 1-2 through hydrochloric acid; adding SnC14.5H2O; heating and stirring to generate faint yellow powder; washing and drying; and roasting for 2-4h under the temperature of 600-800 DEG C to obtain the stannic oxide loaded sheet mica, wherein the sheet mica suspension contains 8-12wt% of the sheet mica; the mass ratio of the added SnC14.5H2O to the sheet mica is (0.2-0.5):1. The polytetrafluoroethylene film is high in antistatic effect and does not influence the electric insulating performance, and the mechanical property is improved.

Description

technical field [0001] The invention relates to the field of film manufacturing, in particular to a polytetrafluoroethylene film. Background technique [0002] PTFE film has high strength, good insulation, and non-stickiness. Among fluoroplastics, PTFE consumes the most and has the widest range of uses. Because there is an inert fluorine-containing shell outside the PTFE molecule , so that it has outstanding non-stick properties and low coefficient of friction. [0003] PTFE has good insulation, weather resistance and flame retardancy, and is known as the "King of Plastics". However, compared with plastics, it has poor mechanical properties and is not wear-resistant. Electrical insulation, non-conductive, so when the outside is rubbed, it is easy to be charged and generate static electricity. Due to the adsorption of static electricity, when the plastic film is processed, the surface of the film is easy to absorb dust and is extremely easy to pollute. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08K9/12C08K3/22C08K3/34C08K7/00C08J5/18
CPCC08J5/18C08J2327/18C08K3/34C08K7/00C08K9/12C08K2003/2231C08K2201/001C08K2201/011
Inventor 陈廷芳
Owner 镇江市宜扬密封制品有限公司
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